# Compile Java sources using `ant`
	fun build_with_ant(compiler: JavaCompiler, jfiles: Array[String]) do
		compile_antfile(compiler, jfiles)
		var outname = compiler.outname.to_path.filename
		var antpath = "{compiler.compile_dir}/{outname}.xml"
		self.toolcontext.info("ant jar -f {antpath}", 2)
		var res
		if self.toolcontext.verbose_level >= 3 then
			res = sys.system("ant jar -f {antpath} 2>&1")
		else
			res = sys.system("ant jar -f {antpath} 2>&1 > /dev/null")
		end
		if res != 0 then
			toolcontext.error(null, "ant compile failed! Error code: {res}.")
		end
	end